Best Free Solar Design Software for 2023

Best Free Solar Design Software for 2023

Are you looking to harness the sun's power for renewable energy projects? Solar design software can be your best friend in this endeavor. 

This guide will introduce you to the top free solar design software options available in 2023. 

Whether you're a seasoned solar professional or a curious beginner, these tools can help you easily plan, design, and optimize solar installations. Let's dive in!

Best Free Solar Design Software for 2023

ARKA 360

ARKA 360 has earned the top spot on our list due to its exceptional features, user-friendliness, and ability to cater to the unique needs of the Indian solar industry.

Advanced Solar Simulation: ARKA 360 offers highly accurate solar irradiation and shading analysis, allowing users to simulate and visualize the performance of solar installations under various conditions. This level of detail is crucial for optimizing system designs.

Local Data Integration: ARKA 360 integrates local climate and meteorological data, ensuring precise calculations and energy yield predictions tailored to specific Indian locations. This feature sets it apart from many global solar design software solutions.

Compliance with Indian Standards: ARKA 360 is designed to comply with Indian solar standards and regulations, simplifying the process of obtaining approvals and permits for solar projects in the country.

User-Friendly Interface: The software boasts an intuitive and user-friendly interface, making it accessible to experienced professionals and solar industry newcomers.

Financial Analysis: ARKA 360 provides comprehensive financial analysis tools, enabling users to evaluate the economic viability of their solar projects by factoring in costs, incentives, and payback periods.

Customer Support: ARKA 360 offers excellent customer support, including training and assistance, ensuring that users can harness the software's full potential.


About & Why We Picked It:

SolarCAD is a versatile solar design software perfect for residential and commercial projects. Its user-friendly interface makes it an excellent choice for beginners and offers advanced professional features. We picked SolarCAD because it strikes a perfect balance between simplicity and functionality.


  • User-friendly interface.
  • Accurate shading analysis.
  • Extensive component library.
  • Detailed financial analysis tools.


  • Limited to a certain number of projects in the free version.
  • Steeper learning curve for advanced features.


  • Solar panel layout planning.
  • Detailed energy yield calculations.
  • Shade analysis with 3D modeling.
  • Financial modeling and ROI estimation.


About & Why We Picked It:

PVsyst is a robust solar design software used by professionals worldwide. It stands out for its precise simulation capabilities and in-depth performance analysis. We selected PVsyst because of its reputation for accuracy and reliability.


  • Highly accurate energy yield predictions.
  • Comprehensive database of PV modules and inverters.
  • Detailed shading analysis.
  • Integrated financial analysis tools.


  • Complex interface, not ideal for beginners.
  • Limited free version functionality.


  • 3D shading analysis.
  • Energy yield simulations for various locations.
  • Component database with regular updates.
  • Financial modeling for project profitability.

SunDesigner Pro

SunDesigner Pro is a well-rounded solar design software solution that earns its place among the top options for 2023. It stands out for its robust design and simulation capabilities, making it an excellent choice for those focused on precision and detailed project analysis. We selected SunDesigner Pro for its advanced shading analysis, compatibility with various solar equipment, and reliable customer support.


  • Advanced shading analysis for precise solar system designs.
  • Extensive compatibility with solar panels, inverters, and batteries.
  • Comprehensive financial modeling and ROI calculations.
  • Responsive customer support and regular software updates.


  • Higher pricing tier may not suit smaller budgets.
  • Requires some experience for full utilization of advanced features.


  • In-depth shading analysis with 3D modeling.
  • Accurate solar system simulation and energy production estimates.
  • Financial modeling tools for cost and savings projections.
  • Integration with third-party databases for component selection.

SolarCAD Pro

SolarCAD Pro is a versatile solar design software that earns its place on our list due to its flexibility and affordability. It caters to both residential and commercial projects and offers a range of features for solar professionals. We chose SolarCAD Pro for its budget-friendly pricing, customizable design options, and compatibility with various project sizes.


  • Affordable pricing with flexible plans.
  • Customizable solar system designs to meet specific project needs.
  • User-friendly interface suitable for beginners.
  • Suitable for both residential and commercial projects.


  • May lack some advanced features compared to premium options.
  • Support and updates may not be as frequent as some competitors.


  • Solar panel layout and system optimization.
  • Energy production and financial analysis.
  • Integration with local weather data for precise calculations.
  • Exportable reports for project documentation.


PVDesignPro is an emerging player in the solar design software arena, and it's gaining recognition for its innovation and affordability. While it may not have the same extensive history as some competitors, its commitment to cutting-edge technology and cost-effectiveness make it a worthy choice. We picked PVDesignPro for its AI-driven design assistance, competitive pricing, and forward-thinking approach.


  • Innovative AI-driven design assistance for quicker project planning.
  • Competitive pricing that suits various budgets.
  • Intuitive interface with guided workflows.
  • Emphasis on continuous updates and feature enhancements.


  • Limited database compared to more established software.
  • May not offer the same level of customer support as larger companies.


  • AI-assisted solar system design for efficiency.
  • Automated shading analysis and energy production estimates.
  • Simplified financial modeling for quick project evaluations.
  • Regular feature updates to stay current with industry trends.

What Is Solar Design Software?

Solar design software is a specialized tool used for planning and designing solar photovoltaic (PV) systems. It helps users calculate energy production, assess shading effects, select the right components, and estimate the return on investment for solar projects.

How Do Solar Design Software Work?

Solar design software is a critical tool in the planning and execution of solar energy projects. These software applications use a combination of geographical data, mathematical algorithms, and engineering principles to simulate the performance of solar photovoltaic (PV) systems. Here's a simplified explanation of how they work:

Input Parameters: Users input specific parameters into the software, including location coordinates, panel specifications, orientation, tilt angles, and shading data. Some advanced software may also consider climate data, such as temperature and solar irradiance.

Geographic Data: Solar design software uses geographic data to determine factors like solar irradiance (sunlight intensity), azimuth (solar panel orientation), and shading patterns. Geographic databases provide information about a location's solar potential, which varies based on latitude, longitude, and local obstructions.

Mathematical Modeling: The software uses mathematical models to calculate the expected energy output of the PV system. This includes estimating the energy generated from sunlight captured by the panels and accounting for losses due to shading, temperature variations, and system inefficiencies.

Simulation: Solar design software simulates solar energy production over time, often hourly or daily. It considers the sun's changing position throughout the day and year, allowing users to assess how different panel configurations and orientations affect energy generation.

Output Analysis: The software provides users comprehensive output data, including energy yield projections, performance ratios, and financial metrics. This information helps users make informed decisions about system design, component selection, and financial planning.

Different Types of Solar Design Software

Solar design software comes in various forms, each tailored to specific aspects of solar project planning and execution. Understanding the different types can help you choose the right tool for your needs:

PV System Design Software: These tools are the backbone of solar design. They allow users to create detailed layouts of solar panel arrays on rooftops or open fields. To optimize energy production, PV system design software considers factors like panel orientation, tilt angle, and shading analysis.

Financial Analysis Software: Beyond the technical aspects, financial analysis software helps assess the economic feasibility of solar projects. It calculates payback periods, return on investment (ROI), and lifetime cost analysis. This type of software is invaluable for decision-makers and investors looking to understand the financial implications of going solar.

Shading Analysis Software: Shading can significantly impact solar panel performance. Shading analysis tools use 3D modeling and geographical data to predict how shadows from nearby objects, like trees or buildings, will affect energy production. This information allows users to adjust panel placement for maximum efficiency.

Performance Monitoring Software: Once a solar system is up and running, it tracks its energy production in real-time. It helps identify issues or inefficiencies, allowing for timely maintenance and optimization.

BIM (Building Information Modeling) Integration Software: In the context of solar design, BIM software integrates solar panel layout plans into existing building models. This ensures seamless integration with architectural plans and aids in collaborative construction projects.

Battery Sizing Software: Battery-sizing software is essential for projects incorporating energy storage. It calculates the optimal battery size based on energy consumption patterns, ensuring efficient energy storage and distribution.

Choosing the right type of solar design software depends on your specific project goals: optimizing panel layout, evaluating financial viability, or managing system performance. Combining the strengths of these different types of software can lead to successful and efficient solar installations.

How to Choose the Best Solar Design Software?

Choosing the right solar design software depends on your specific needs and expertise level:

User-Friendly Interface: If you're a beginner, opt for software with an intuitive, user-friendly interface. It will help you start quickly and save time on the learning curve.

Advanced Features: Professionals should seek software with advanced features like accurate shading analysis, 3D modeling, and financial modeling tools. These features are essential for complex projects.

Cost: Consider your budget. Some software offers free versions with limited functionality, while others require a subscription or one-time purchase. Balance your needs with your budget.

Compatibility: Ensure the software is compatible with your operating system and hardware. Compatibility issues can cause delays and frustration.

Customer Support: Check if the software provider offers reliable customer support and updates. Good support can be invaluable when you encounter issues or have questions.

Reviews and Recommendations: Research user reviews and seek recommendations from industry peers. Real-world experiences can provide valuable insights.

Trial Period: Take advantage of trial periods or free versions whenever possible to test the software's suitability for your specific projects.

Bottom Line

Solar design software plays a crucial role in the success of solar projects. The right software can streamline the design process, improve accuracy, and enhance the financial viability of your solar installations. Explore the options in this guide, and choose the one that best suits your needs.


FAQ - 1: Is free solar design software reliable for professional use?

Free solar design software can be reliable for certain tasks and smaller projects. However, for complex commercial installations, investing in paid software with advanced features and support is advisable.

FAQ - 2: Can I use solar design software for off-grid systems?

Yes, many solar design software options can be used for off-grid systems. Ensure the software you choose supports calculating battery storage and other off-grid components.

FAQ - 3: Can I use solar design software for residential and commercial projects?

Yes, many solar design software options are versatile and suitable for residential and commercial applications. However, the choice of software may depend on the scale and complexity of the project. Commercial projects, especially those involving large installations or complex system configurations, may benefit from software with advanced features and scalability.

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About The Author
ritik n.
Written By
Tushti B.
Content Writer
Tushti Bajaj is a dedicated content specialist at Arka Energy, blending her diverse background in media, research, and publications. Holding qualifications from the University of Delhi and Delhi Technological University, she brings enthusiasm and drive to her work, fueled by her passion for sustainability. With a keen eye for detail and a commitment to excellence, Tushti is dedicated to crafting engaging and informative content.
ritik n.
Reviewed By
Ritik N.
Digital Marketing Specialist
Ritik N. is a Digital Marketing Specialist at Arka Energy, merging his professional prowess with a deep passion for sustainable living and solar energy. Advocating for renewable solutions, Ritik channels his expertise to promote eco-consciousness and advance the adoption of solar energy for a brighter future.

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